Refrigerator



FIG. 1 is a front elevation view of a refrigerator showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation view thereof, the left side elevation view is a mirror image thereto; and,

FIG. 4 is a perspective view thereof.

The rear and bottom of the refrigerator is not visible during use.

The broken line in figure drawings represent unclaimed environment only and forms no part of the claimed design. 

CLAIM The ornamental design for a refrigerator, as shown and described. 